Quiz#3 disorders of the cornea

Question 0

1.the \_\_\_\_\_\_\_\_\_\_\_\_ is a transparent and Avascular refracting surface.
Layers include:Epithelium 
                        Bowmans
                        Stroma 
(                       (dua)
                        Endothelium

Answer 0

Cornea

Question 1

2. ____________ regenerates quickly

Answer 1

Epithelium

Question 2

3. _________ never regenerate and if damaged can cause corneal edema and the cornea will loose transparency also known as the ___________.

Answer 2

Endothelium

Ground glass appearance

Question 3

4. The average diameter of the cornea is _______

Answer 3

11-12mm

Question 4

5. ____________ shows corneal enlargement greater than 12mm

Answer 4

Congenital Glaucoma

Question 5

6. ______________ is an inflammatory of the cornea ( kera)

Answer 5

Keratitis

Question 6

7. ___________ are round , grey/white clusters of inflammatory (WBC’s ) that can be superficial in the epithelium or deep in the Stroma. They do not stain with Fluorescein.

Answer 6

Infiltrates

Question 7

8. Epithelial vacuoles and microcysts can be from _________ due to contact lens wear. They do not stain with Fluorescein.

Answer 7

Hypoxia

Question 8

9. _________ is a lack of oxygen to the corneal cells

Answer 8

Hypoxia

Question 9

Noninfectious Keratitis
Keratoconjunctivitis Sicca
PEK. ( Punctate epithelial keratitis) also known as SPK ( superficial Punctate keratitis)

Non- infectious ( culture negative) peripheral / marginal ulcers

Answer 9

• nothing -

Question 10

10. Dry eye Syndrome is known as ______________________ and PEK or SPK is seen on exam .

Answer 10

Keratoconjunctivitis Sicca

Question 11

11. __________________ otherwise known as _____________are areas of fine erosions of the corneal epithelium that stain with Fluorescein or Rose Bengal dyes. It was first reported by Thygeson and causes tearing , FBS, photophobia, and decreased vision.

Answer 11

Punctate epithelial keratitis (PEK)

superficial Punctate Keratitis (SPK)

Question 12

*****Causes of SPK / PEK are: 1-7

Answer 12

Keratoconjunctivitis Sicca 
Adenovirus ( ADV)
Herpes simplex 
Chemical injuries
Overuse of contact use 
Exposure to light - welding , sunlamps
Reaction to topical or systemic medication

Question 13

*** exposure Keratitis can lead to ulceration of the cornea and is often seen in Bell’s Palcy or Graves Disease where the lids won’t close properly

Answer 13

**

Question 14

Infectious Keratitis

• bacterial
  
  • strep
  • pseudomonas
• Fungal
• Protozoa-amoebae
  
  • Viral ~herpes~adenovirus

Answer 14

-

Question 15

12. ______/____________________ are non-infectious ulcers that can be associated with staphylococcal blepharitis, contact lens wear Or Rheumatoid arthritis and pseudomonas. When associated with blepharitis there is a hypersensitivity reaction directed against __________ produced by the staph and can be treated with corticosteroids

Answer 15

Marginal/ peripheral (CNPU)culture negative ulcers

Exotoxins

Question 16

13.______________ can be from strep, a gram positive organism or from Pseudomonas, a gram negative organism

Answer 16

Bacterial keratitis

Question 17

14._______________ has a grey-white , dry-appearing infiltrate that has a delicately filamentous feathery edge

Answer 17

Fungal keratitis

Question 18

15. _____________________ was once prevalent in soft contact lens wearers who prepared home made saline solutions from tap water or distilled water but is still seen more so with contact lens wear

Answer 18

Acanthamoeba keratitis

Question 19

16._____________________ is acquired from the environment as opposed to infection that arises from viral latency , showing vesicular blepharoconjunctivitis and may involve the cornea

Answer 19

primary herpes simplex

Question 20

17. _______________ is a inflammatory corneal disorder also responsible for cold sores and reveals a corneal dendritic ulcer with terminal bulbs when stained with Fluorescein. It can also present with a geographic ulcer or SPK

Answer 20

Herpes Simplex Keratitis ( HSV)

Question 21

18._______________is caused by a varicella virus
In recurrent chicken pox, and patients have facial blisters following the Trigeminal nerve with neuralgia pain and pseudodentrites in the cornea with no terminal bulbs.

Answer 21

Herpes Zoster

Question 22

19. _______________ are used to treat Herpes Zoster but will make Herpes Simplex worse . Both Herpes Zoster and Simplex can be treated with __________ and _____________

Answer 22

Corticosteroids ( medicine , not natural)

Viroptic Drops and Zovirax oral medication

Question 23

20. ______________ is from an oculodermatologic disease characterized by facial redness , sebaceous-gland disfunction on the face, neck, shoulders , and keratitis, and can present with flushing episodes associated with alcohol , hot drinks and spicy food

Answer 23

Rosacea Keratitis

Question 24

21. Corneal Neovascularization can be from infection , inflammation , nod stage glaucoma , trauma, or poor contact lens fit resulting in hypoxia , and is otherwise known as _________.

Answer 24

Pannus

Question 25

22. ____________ are empty blood vessels remaining after corneal invasion by vessels that were filled by blood .

Answer 25

Ghost vessels

Question 26

WRONG : marginal/peripheral culture negative ulcers - THEY CAN BE CAUSED BY PSEUDOMONAS.

what can cause infectious keratitis?
-Acanthamoeba

Answer 26

Study!